Internal-combustion engine.



` A. H. DE GASTON &F.'MLEAN. lNTERNAL COMBUSTION ENGINE. AEPLICTION FILED lULYT. 1913.

1915557.09. Patented oet. 5,1915.

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A parra earns ramener ora-ion- ALBERT YI-I. DE GASTON AND FREDERIC MCLEAN, OF SACRAMENTO, CALIFORNIA,

ASSIGNORS TO GLOBE IRON WORKS, OF SACRAMENTO, CALIFORNIA, A CORPORA- lTION 0F CALIFORNIA. i

i INTERNAL-COMBUSTION ENGINE.

aisance.

' FREDERIQ'MCLEAN, a subject of Great Britain, residentsofthe city of Sacramento, county of Sacramento, State of California, have invented certain new and useful Improvements gines, of which. the following is av specifi- Tlie invention relates to internal combustion vengines and particularly to internal combustion engines adapted to operate on 'l The object of the invention is to provide a unitary mechanism for feeding the oil fuel `and water to the cylinder of the engine. 'A' further object of the invention is to 'providefmeans controlled by the speed of the engine for varying the charge of oil and water.

lith these and `other objects in view, as

i will more fully hereinafterlappear, the invention consists in certain novel features of construction and arrangement of parts,

hereinafter fully described, illustrated inthe accompanying drawings and `particullarly pointed outinthe appended claims, .it being understood that various changes 1nA pump and its operating mechanism, the

pump being shown in section. Fig. 4 is a cross section, on a largerscale, of the double feed pump.

f The engine shown in the accompanying drawings is of the two-cycle type, but it is evident that the invention can be applied to engines `of the fou' cycle type, with equal eiiiciency.

In operating internal Icombustion engines using oil fuel, itis advantageous to supplv a quantity of water to thev cylinder at each cycle in order that suiiicient oxygen may bepresentto unite with all of the carbon in the Specification of Letters Patent.

in Internal-Combustion En-y Patented Oct. 5, 1915.

^ Application filed July '7, 1913. Serial No. 777,614.

fuel. According to the present invention, one pump is employed for introducingthe charges of both oil and water, the cylinders 1n the pump barrel bein-0'` so proportioned that the proper proportion of the two charges is introduced. The pump is operated from the'drive shaft of the engine and a governor is employed to Vary'the stroke of the pump piston with variations inspeed of the engine.

In the engine illustrated, ycompression takes place in the crank case 2 during the forward movement of the piston 3 in the cylinder4, or on the firing stroke. As the pis- -ton reaches the end of its forward stroke,

the exhaust port 5 and the inlet'port 6 are uncovered, the exhaust port being uncovered 1n advance of the inlet port. The burnt gases in the cylinder exhaust through the port' and compressed air from thecrank case enters the cylinder through the port 6 and is .deiiected toward the head 7 of the cylinder by the delector 8 on the piston. While the compressed air is passing into the cylinder, a charge of water is delivered from the conductor 9 arranged above the port 6 and is carried into the cylinder. Simultaneously, acharge of fuel is introduced' into the cylinder through the fuel injection nozzle 12 and is discharged onto the igniter 13, which is of suiiicient temperature to volatilize the charge.

Water is fed to the conductor 9 through lthe conductor 14 connected to the` discharge side of the pump 15, which conductor is preferably provided with a sight feed 16. The oil fuel is conducted to the in'ection nozzle 12 through the conductor 1 connec'ted tothe discharge side of the pump 15. Check valves 18' are preferably provided to prevent the return of the water or oil in the conductors 14 and 17 during the suction stroke of the pump..

.The pump 15 comprises a casing'21 which is attached to some stationary part of the engine. The casing is provided with a differential bore in which operates a differential piston 22. The water pumping bore 23 is made considerably larger in diameter than the oil -pumping bore 24 to allow for the insertion of -an efficient packing ring 25 between the two bores or cylinders. The pack- 2G, arranged in the larger bore 23 of the ning ring 25 is held in place by the bushing cylinder.- `rIhe rear end Aof the bore,23 is closed by a packing ring 27 abutting against the bushing 2,6 and being pressed against said bushing and held in place' bythe packing gland 28 and the gland nut 29. The bushing 26 is provided with a wide circumferential groove 46 which communicates with the water inlet and discharge ports, and the interior of the bushing or the water pumping cylinder communicates with this `groove through-the apertures 47. Water and oil are conducted to their respective cylinders in the pump through the conductors 31 and 32 extending to a source of supply.

means of the nut used on various sized engines.

These conductors are provided with check valves 48 to prevent the liquid from being forced backward on the pumping stroke.

The differentialn piston 22 terminates in a head33, between which and the gland nut 29 is arranged a helical spring 34 which operates to mtv the piston on the :suction stroke. Alined with the piston 22 and adapted to press against the head thereof to operate' the pump is a screw 35 which'isadjusb, ably clamped .-to the governor rod 36 by 37. By adjusting the piston of the screw on the governor rod 36, the stroke of the pump mayl beadjusjted, thereby permitting one size of pump to be The gqveri nor rod 36 is connected to the eccentric strap 38 which surrounds the eccentric 39. The

-' eccentric is free to slidein a horizontal di- `rection over the crank shaft 41 and is -at-v tached at its forward end tothe governor weight 42 by the pin 43. The governor adjusting ring` 44 is connected to therearend of .eccentric by means'of the link 45. outward movement of the governor weight decreases the throw of the eccentric 39, consequently decreasing the travel of the gover. nor rod 36 and causing the proper amount engine cylinder,

of oil and water to be injected into the en! gine cylinder.

The igniter and the means for holding it in place and the scavenging flange arranged on the piston are described and claimed in (3o-pendingy applications, and description thereof in this application is unnecessary.

We claim: 1." The combination with an internal comfuel,\of a double feed pump adapted. to feed simultaneous charges of oil and water to the a double piston in said 'bustion engineadapted to operate on oil pump, means connected to the engine adapt` ed to abut against said piston and press it forward on thefpumping stroke, -means for adjusting the limitof movement of said piston to give a variable normal engine speed,

and means for moving the piston on the suotion stroke.'

2. The combination with an internal combustion` engine adapted t9 operate on, oil

fuel, of a double .feedupump arranged to simultaneouslyvfeed charges of oil 'and water to different parts ofthe engine cylinder, a

double piston in said pump, means connected to the engine and controlled in its movement 1 by variations in the positionof lthe engine governor operation said double piston, and means for varying the length of saidlast named means .where-1 arranged to be reciprocated by thel of the engine and to abut against have hereunto v 

